Irradiation performance of Fast Flux Test Facility drivers using D9 alloy [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 26 pages : digital, PDF file
Additional Creators:: Westinghouse Electric Corporation, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Six test assemblies similar in design to the FFTF driver assembly but employing the advanced alloy D9 in place of Type 316 stainless steel for duct, cladding, and wire wrap material were irradiated to demonstrate the improved performance and lifetime capability of this design. A single pinhole-type breach was incurred in one of the high exposure tests after a peak fuel burnup of 155 MWd/kgM and peak fast neutron fluence of 25 × 10²² n/cm² (E > 0.1 MeV). Postirradiation examinations were performed on four of the test assemblies and measured results were compared to analytical evaluations. A revised swelling correlation for D9 Alloy was developed to provide improved agreement between calculated and measured cladding deformation results. A fuel pin lifetime design criterion of 5% calculated hoop strain was derived. Alternatively, fuel pin lifetimes were developed for two irradiation parameters using statistical failure analyses. For a 99.99% reliability, the analyses indicated a peak fast fluence lifetime of 21.0 × 10²² n/cm², or a peak fuel burnup greater than 120 MWd/kgM. The extended lifetime capability of this design would reduce fuel supply requirements for the FFTF by a third relative to the reference driver design.

Report Numbers:

E 1.99:whc-sa--2261
E 1.99: conf-940602--15
conf-940602--15
whc-sa--2261

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Note:

Published through SciTech Connect.
06/01/1994.
"whc-sa--2261"
" conf-940602--15"
"DE94015711"
"35AF11201/35AF11202"
35. annual meeting of the American Nuclear Society,New Orleans, LA (United States),11-16 Jun 1994.
Gneiting, B.C.; Pitner, A.L.; Bard, F.E.

Funding Information:

AC06-87RL10930

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